Thread winding frames



Dec.- 13, 1960 CARL-GEORG ROSENKRANZ EI'AL 2,964,254

THREAD WINDING FRAMES Filed Sept. 12, 1957 2 ets-Sheet 1 HTTOHNEH Dec. 13,1960 CARL-GEORG ROSENKRANZ EIAL 2,954,254

THREAD WINDING FRAMES Filed Sept. 12, 1957 2 Sheets-Sheet 2 Fig. 6

' INVENTOR United States stenbach &' Co., Wuppertal-Wichlinghausen, Germany, a Kommanditgesellschaft ofGermany File'd Sept. 12, 1951, Ser; No. 683,544

Claims priority, application German'y Sept. 18, 1956 Claims. or. 242

This invention relates to a thread winding frame for the textile industry and in which the thread; is automati= cally passed from a completed bobbin to the next tube, andis applicable particularly to winding frames withv automatic bobbin feed. 1 v 31 I In bobbins 1 produced by previously known winding frames of this kind the beginning end. of the thread usually projects from the winding and is frequently wound in, only in the region of the upper layers of thread. This necessitates additional work on the wound bobbins, that is to say removal of any exposed thread end by hand, and may nevertheless result in disturbance of the thread during'winding-oif, the consequence thereof being interrup tion of the operation of machines manufacturing textile products and using bobbins of this kind.

Numerous attempts have already been made to obivate this disadvantage of mechanically produced'bobbins, but complete success has not hitherto been obtained. According to one prior proposal intended for this purpose catches are provided which rotate with the head driving the bobbin and are intended to catch the thread still connected to the ejected wound bobbin. In these devices the thread end is freed shortly after the bobbin commences rotation, so that said thread end first projects radially as it rotates with the bobbin. It is then intended to be picked up and wound in by one of the following turns. Experience has shown that this action does not take place dependably.

It has also been proposed to locate a sleeve over the driving head acting on the tube, as far as the end of the bobbin, said sleeve having a catch which, when the device starts to rotate, is intended to catch and wind up in the form of -a loop the connecting thread still extending to the ejected previously wound bobbin. The part of the thread extending to the completed bobbin then breaks o-if and on the return of the sleeve-shaped member the loopshaped part of the thread is freed, then being fixed by following rotation of the bobbin. Even in these devices the. desired effect does not take place dependably, so that bobbins produced in this Way also frequently cause trouble iriuse. V

,The object of the invention is to provide a winding frame in which the beginning part of the thread to bev brought on to the bobbin to be wound is neatly and dependably fixed by the first turns of the thread without therebeing any risk of this end extendinginto regions of the outer layers of the winding whereby disturbances during the winding-oif of the thread from a wound bobbin.

:Thus in contrast to the previously proposed Winding frame in which a thread end which first projectstangentially owing to centrifugal force is bound in more or 7- ;is subjected to practically no friction stresses.

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less accidentally by following layers of the winding, with the device of the invention the thread end is held against the bobbin tube by the guide device so that the initial following winding turns hold the end securely in position by overlapping the said end. A fundamental disadvantage of bobbins produced on hitherto known winding frames is thus obviated, because a thread end fixed in such amanner cannot obstruct trouble-free winding-01f of the thread even under unfavourable conditions.

The invention may be carried out in many different In order not to disturb the winding operation or render complicated the means required to guide the thread, it is advantageous to dispose the device of the invention so thatit is slidable transversely to the bobbin tube, where-' by the same can be moved into the region of the tube only for a very short interval of time at the beginning of winding. The device has means co-operating with the tube which may comprise a number of members rigid in themselves and adapted to close around the tube on the principle of radially directed movements or in the manner of tongs. Alternatively such means may comprise a flexible member which at the commencement of Winding is adapted'to embrace the tube by following its form. It is thus possible always to obtain the desired fit of the guide relative to the tube, irrespective of any varying diameters of the bobbins, since the member being flexible an automatic adjustment takes place. In addition, with such constructions it is possible to allow the part of the guide co-operating directly with the tube to rotate with the bobbin so that the thread material to be wound up,

Resilient guide means of this kind are advantageously formed by an endless band which is caused temporarily to embrace the tube for the greater part and to rotate therewith. Under these circumstances the devices may be constructed particularly simply by providing an endless band which by part of its length substantially engages around the tube in the form of a loop at the commencement of winding. 7 A band of this kind may consist entirely of longitudinally extensible preferably rubber-like material in order auto-j matically to furnish always by its own resilience the rehave a friction-increasing lining in order to be driven practically without slip by the rotating tube. In some cases however it is more advantageous to use a band, for ex ample a metal foil, having a very smooth surface and possibly non-rotatable but in most cases a flexible band hav;

-- inga surface giving a high co-efiicient of friction is pre- The-band 'or other part periodically surrounding the region of the beginning of the Winding of the bobbin may naturally be profiled to correspond to the shapefof the tube in order to obtain dependable guidance of the thread forrns. .For example, theguide rollers facing the bob" end. s f' One preferred embodiment of the invention accordingly provides an endless band which substantially forms the guide and which passes over at least three guide members such as rollers, at least one of which is ad ust able. Preferably, however, .in such arrangements two guide members such as rollers. are mounted'so astolbe f adjustable in opposite directions to onepanothen f'lhei adjustment may then be derived without furthercontr'ol means from the guide device displacement which is pref erably provided and which is directed transversely with respect to the bobbin tube. Constructions suitabl foi this purpose, and which act non-positively or positively on the adjustable guide members, are known in various,

bin tube for the endless band forming the essential"part;

of the guide device may be mounted on lever members which are movable relative to one another scissorsfashion and which are adjustable relative to the bobbin tube through links, preferably against spring loading, in dependency on the position of the guide device. A stop is then sufficient for the control, which stop after an initial transverse movement of the entire device, for which the driving force is conducted through the spring arrangement provided, stops the movement of the device-the still continuing driving movement thereupon taking effect in a drive of the lever members carrying the guide rollers or the like, which lever members cause the endless band to embrace the bobbin tube. I

Other constructions are also possible however. For example, guide cams operative positively or nonpositively under spring tension and controlling the required movements can be associated with the levers or with the slides or the like carrying the guide members facing the bobbin tube. V

The device according to the invention is advantageously so controlled that the region of the beginning of the winding of the bobbin tube is already surrounded before its rotary movement begins. In some cases it is also possible to provide for a difierent mode of working, that is, to allow the guide to act on the tube only when the latter is already rotating.

One particular embodiment of the invention is illustrated in the accompanying drawings in which:

Figure 1 is a view showing diagrammatically the position of the parts of the winding-on device immediately prior to the beginning of the winding-on operation.

Figure 2 is a side elevation of Figure 1.

Figure 3 is a view similar to Fig. 1, but showing the parts in position at the commencement of thread winding.

Figure 4 is a side elevation of Figure 3.

Figure 5 shows the operation of the guide diagram matically on a larger scale.

Figures 6 and 7 are views similar to Figs. 1 and 3 but to a larger scale and showing a particular construction for operating the thread securing means.

The embodiment shown in the drawings is based on a conventional construction of winding frame, in which successively individual or a plurality of tubes are fed at a time and are automatically placed in position for winding and released after winding, the thread being passed automatically from a completed bobbin to the next empty tube.

During the winding process the thread 10 is guided by a thread guide 11 over the tube in a direction desired at any time. The devices 12 serving to control the position of the thread guide 11 are of known construction. Similarly, the mechanism serving to change the bobbin does not form the subject of the present invention. In manner known per se the machine is provided with a clamping device 13 which at a predetermined time secures the portion of the thread leading to the ejected completely wound bobbin 14 so that this part of the thread can be separated.

For the explanation of the invention, it will be assumed that the tube 15 has been introduced into the machine and is now to be wound. In order under these circumstances to secure neat winding in of the beginning of the thread the guide device denoted generally by 16 is provided. Said guide device 16 comprises three support rollers 17, 18, 19 which are mounted rotatably on a slide (not shown in Figures '1 to 5) slidable transversely to the tube and over which an endless band 20 of rubber or other flexible material is placed. Figures 1 and 2 show the guide in the initial or non-operative position. In this position the thread is not influenced by the guide device 16. The guide device assumes the same position during by far the greater part of the winding operation.

At the commencement of winding the thread on to the tube 15, the slide carrying the guide device 16 according to Figures 1 and 3 is moved to the left, preferably 4 before the tube 15 is set in rotation. The portion of the band 20 extending between the support rollers 18 and 19 then bears by its outer surface against the winding-on region of the tube. The rollers 18 and 19 are then moved relative to one another by means not shown in Figures 1 to 5, so that as shown'in Figures 3 and 4 the tube 15 is substantially surrounded by part of the band 20. As a result of displacement of the thread and also due to the fact that the thread is clamped fast in the device 13 the thread is severed by a knife 21 which is fixed. The movement of the guide device 16 serving for the beginning of winding is accordingly utilised to separate the thread at a predetermined point, the device 13 by fixing the thread previously always ensuring identical initiation of the beginning of the winding process. The thread end then bears, as shown by Figure 5 in particular, over its entire length against the surface of the winding-on region of the tube. Said thread end is therefore already securely fixed by a few following turns of the thread, which form after the drive is put into operation. On the subsequent windingoff of the thread therefore no obstructions can occur. After the thread end is fixed, the guide device 16 is moved to the right back into the inoperative position shown in Figures 1 and 2, so that the remainder of the winding process is uneffected by the device.

Figures 6 and 7 show one particular construction of means for controlling operation of the device 16 and the control of the rollers 18 and 19 carrying the band 20. As shown the rollers 18 and 19 are mounted on approximately angular double levers 25 and 26, which in their apex regions are swingable about a common pivot 27. Links 30 and 31 bear on the free ends of the angle lever arms 28 and 29 respectively, the other ends of said links being rotatably mounted at a common axis 32. The axis 32 may for example be carried by a slide slidable in a guide 33. A compression coil spring 34- is inserted between the slide and a slidable part of the guide device carrying the pivot 27. The initial tension of said spring 34 is fixed by suitable stops of the angular double levers 25, 26 or by a link connecting the pivots 27 and 32 and forming a stop. A lever 35 forked at its free end and driven so as to be rockable in timed sequence with the machine acts as drive upon the slide movable on the guide 33 and carrying the axis 32.

On a rocking movement of the lever 35 in the anticlockwise direction the guide device 16 is first moved to the left through the medium of the initial tension of the spring 34, until the part carrying the pivot 27 runs against a stop 36 of the slideway. The pivot 27 accordingly cannot follow the further rocking movement of the lever 35, so that only the slide associated with the axis 32 is advanced further, the tension of the spring 34 increasing. The approach of the axes 27 and 32 towards one another results, through the medium of the links 30, 31, in closing movements of the lever members 25, 26. The arrangement of the parts is so chosen in the device that the movements take place in such manner that the band 20 first bears against the tube by its portion lying between the rollers 18, 19 and deforms in so doing. After the further forward movement the closing movement of the lever members 25, 26 then begins so that, as shown in Figure 7, the band substantially embraces the tube. After the thread end has been wound fast, the device is first released by a rocking movement of the lever 35 in the clockwise direction and thereupon returned into the initial position.

The construction shown and described above is only one particular embodiment of the invention. The latter is not limited thereto. On the contrary, many other constructions are possible. Instead of an endless band, a finite construction could be provided. The guide means associated with the band may differ from the drawing in respect of number and arrangement. The guide device may be embodied in machines differing from the war embodiment and having a thread adapted to be passed automatically to the tube following a completed bobbin ineachcase.

1. Thread winding arrangement comprising in' combination, supporting means for supporting an'empty bobbin tubein a winding position forrotation aboutan axis; holding means for holding an end portionof a thread adjacent one end portion of said tube when the same is in said winding position and including a clamping means transversely spaced from said axis so that said thread end portion extends straight in a tangential direction to the tube beyond the same; cutting means located between said axis and said clamping means; a guiding device having indirection of said axis an extent substantially corresponding to the axial length of said end portion of said tube,'said guiding device being supported on 'said supporting means so asto be located opposite said one end portion of said tube'with said thread end portion located between said device and said tube, said guiding device being mountedon said supporting means for movement transverse to said' axis toward"and"-away from the same between an inoperative position in which said thread end portion ,extends straight to said'c'la'mping means and an operative positionextending partlyaround said axis so as to closely'surroun'd a major'part of the periphery-"of said one end portion of said tube and ative position whereby the cut olf end of said end portion of said thread is tightly wound around said end portion of ,said tube; andoperating means -for moving said guiding device to said, operativeposition at the beginning of a winding operation, and for moving said guidingdevice to. said. inoperative'positi'on during continued winding olisaidthread .on said tube.

2. Thread winding arrangement compnsing'in-jcombination, supporting means .for supporting an empty bobbin tube in a winding position. for rotation about an axis; holding means for holding 'an end portion'o'f a thread:v adjacent one end portion of'said-tube when the same is inrsaid winding position andinclud-ing-a clamping means transversely spaced from said axis so that said thread end portion extends straight in a tangential direction to the tube beyond the' 's'ame; cuttingmeans locatedbetween said axis and "said clamping means; a guiding device including a flexible band having in direction of said axis an extent substantially corresponding to the axial length of said end portion of said tube, said guiding device being supported on said supporting means so that said band is located opposite said one end portion of said tube with said thread end portion located between said band and said tube, said guiding device being mounted on said supporting means for movement transverse to said axis toward and away from the same between an inoperative position in which said thread end portion extends straight to said clamping means and an operative position in which said band extends partly around said axis so as to closely surround a major part of the periphery of said one end portion of said tube and to press said thread end portion in curved condition against said end portion of the tube at the beginning of the winding operation, said guiding device eifecting cutting of said thread end portion by said cutting means during movement of said guiding device to said operative position whereby the cut off end of said end portion of said thread is tightly wound around said end portion of said tube; and operating means for moving said guiding device to said operative position at the beginning of a winding operation, and for moving said guiding device to said inoperative position during continued Winding 9f said thread on said tube,

6 f 3.'Anarrangement as set forth in claim 2 wherein saidband is an endless loop; and wherein said guiding device includes means movably supporting said band so that said band is driven by the tube. r a I 4. An arrangement as set forth in claim 2 wherein said band consists of an elastic material.

5. An'arrangement as set forth in claim 2 wherein' said band isan endless loop; and wherein said guiding device includes at least three guide rollers for movably supporting said band, and means supporting at least one of said guide rollers for movement to a positionlocated opposite at least one of the other rollers and adapted to be located on the side of said tube remote from. the side located adjacent said one roller.

6. Thread winding arrangement comprising, in combination, supporting means for supporting an empty bobbin tube in a winding position for rotation about an axis; holding means for holding an end portion of a thread adjacent one end portion of said tube when the same is in said winding position and including a clamping means transversely spaced from said axis so that said thread end portion extends straight in a tangential direction to the tube beyond the same; cutting means located between said axis and said clamping means; a guiding device including a support mounted on said supporting means for movement transverse "to said axis, a pair of lever means pivotally connected to each other and being mounted on said support and adapted to be located on opposite sides of said axis and of said end portion of said tube, a first roller mounted coaxial with the pivot axis-of said levers, a pair of rollers respectively mounted at -the ends of said levers, and an endless band mounted on said rollerslocated opposite said end portion of said tube .and having an axial width corresponding to the axial length of said end portion of said tube, saidguiding device being movablebetween an inoperative position in which' said nolle'rs and said band are-adapted to be located spaced from said thread'end portion and said periphery of said end portion of said tube to press said thread end portion in curved condition against'said end portion-of the tube (at thebeginning of the winding: operation, said" guiding-device effecting'cutting of 'said thread end portion byzsaid cutting means during'movemenfof said guiding device to said operative position whereby the cut off end of said thread is tightly wound around said end portion of said tube; and operating means for moving said guiding device to said operative position at the beginning of a winding operation, and for moving said guiding device to said inoperative position during continued winding of said thread on said tube.

7. Thread winding arrangement comprising, in combination, supporting means for supporting an empty bobbin tube in a winding position for rotation about an axis; holding means for holding an end portion of a thread adjacent one end portion of said tube when the same is in said winding position; a guiding device including a guide secured to said supporting means, a pivot means mounted on said guide for sliding movement transverse to said axis, a pair of levers pivotally connected by said pivot means movable with the same and adapted to be located on opposite sides of said axis and of said end portion of said tube, a first roller mounted coaxial with the pivot axis of said levers, a pair of rollers respectively mounted at the ends of said levers, and an endless band mounted on said rollers located opposite said end portion of said tube and having an axial width corresponding to the axial length of said end portion of said tube, a pair of operating links having one pair of ends pivotally connected to each Qthfl' and supported on said guide for sliding movement, the other pair of ends of said links being respectively articulated to said levers, and a stop member on said guide engaging said support in an intermediate position of said guiding device, said guiding device being movable between an inoperative position in which said rollers and said band are adapted to be located spaced from said thread end portion and said tube, and an operative position in which said first roller is located on one side of said tube and said pair of rollers is located on the other side of said tube so that the portion of said band extending between said pair of rollers closely surrounds a major part of the periphery of said end portion of said tube to press said thread end portion against said end portion of the tube at the beginning of the winding operation whereby said end portion of said thread is tightly wound around said end portion of said tube; and operating means for moving said guiding device to said operative position at the beginning of a winding operation, and for moving said guiding device to said inoperative position during continued winding of said thread on said tube, said operating means including a movable member engaging said pivotally connected ends of said links whereby said levers are turned in a scissor-like movement when said support engages said stop member so that said three rollers surround said axis and said tube and so that the portion of said endless band located between said pair of rollers closely surrounds the major pait of the periphery of said end portion of said tube.

8. An arrangement as set forth in claim 7 and including cutting means supported on said supporting means and adapted to be located adjacent the tube so as to cut off the thread end portion adjacent the tube during movement of said guiding device to said operative position.

9. Thread winding arrangement comprising, in combination, supporting means for supporting an empty bobbin tube in a winding position for rotation about an axis; holding means for holding an end portion of a thread adjacent one end portion of said tube when the same is in said winding position and including a clamping means transversely spaced from said axis so that said thread end portion extends straight in tangential direction to the tube beyond the same; cutting means located between said axis and said clamping means; a guiding device including a flexible band having in direction of said axis an extension substantially corresponding to the axial length of said end portion of said tube, said guiding device being supported on said supporting means so that said band is located opposite said one end portion of said tube with said thread end portion located between said band and said tube, said guiding device being mounted on said supporting means for movement transverse to said axis toward and awayfrom the same between an inoperative position in which said thread end portion extends straight to said clamping means and an operative position, said guiding device including a pair of control members supporting the ends of said band and being located on one side of the tube in said inoperative position, and on the other side of the tube in said operative position of said guiding means, said control members being movable toward each other in said operative position to a winding position in which said band extends partly around said axis so as to closely surround a major part of the periphery of said one end portion of said tube and to press said thread end portion in curved condition against said end portion of the tube at the beginning of the winding operation, said guiding device effecting cutting of said thread end portion by said cutting means during movement of said guiding device to said operative position whereby the cut off end of said end portion of said thread is tightly wound around said end portion of said tube; and operating means for moving said guiding device to said operative position at the beginning of a winding operation and for simultaneously moving said control members to said winding position, and for moving said guiding device to said inoperative position and for holding said control members apart during continued winding of said thread on said tube.

10. An arrangement as set forth in claim 9 wherein said control members are rollers, and including a third roller; and wherein said band is an endless loop passing about said rollers.

References Cited in the file of this patent UNITED STATES PATENTS 966,351 Northcutt Aug. 2, 1910 1,020,414 Gulicher Mar. 19, 1912 1,230,750 Menzer June 19, 1917 1,282,236 Kenworthy Oct. 22, 1918 2, 49,506 Vance July 15, 1941 2,692,089 Siegenthaler Oct. 19, 1954 2,718,360 Joyce Sept. 20, 1955 2,721,708 Rogers Oct. 25, 1955 2,736,425 Fisk Feb. 28, 1956 FOREIGN PATENTS 214,142 Switzerland July 1, 1941 

